จำนวน Repository ( 80 )
การประดิษฐ์เซรามิกบิสมัทโซเดียมซาแมเรียมไททาเนต-แบเรียมไททาเนตด้วยเทคนิคการสังเคราะห์แบบเผาไหม้
Ceramic Bismuth Sodium Samarium Titanate - Barium Titanate at the concentration of samarium 0.04 mol% was preparing by ball mill technique. This research has increased the temperature in the combustion process at different temperatures from 940960 and 970 degrees Celsius for 7 hours. The results showed that firing at different temperatures made the ceramic beads very dense. In addition the study of the crystal structure by XRD technique to study the structure of the ceramic BSNT-BT found that the structure is the same substances in the ceramic group BaTiO3. The results of the study of dielectric properties and ferroelectric properties It was found that the dielectric and P-E hysteresis loops were related and tend to correlate with increasing density with sintering temperature. The mechanical properties of ceramics were tested by measuring the hardness of ceramics at different temperatures with temperatures affecting the changes in various properties of ceramics BSNT-BT.
การปรับปรุงคุณสมบัติเฟร์โรอิเล็กทริกของ0.93(Bi0.5-x/0.93Smx/0.93Na0.5) TiO3-0.07BaTiO3 สำหรับเป็นแหล่งกักเก็บพลังงาน
In this study we investigated the effects of Sm2O3 addition in ceramics 0.93(Bi0.5- x/0 . 9 3Smx/0 . 9 3Na0 . 5 ) TiO3 - 0 . 0 7 BaTiO3 by mixing solid oxide solutions. The crystalline properties of the X-ray diffraction and ferroelectric properties were studied from the P - E loop. The physical properties showed that BSNT-BT ceramic density increased and the percentage of shrinkage decreased due to the increase of the amount of Sm2O3. Moreover it was found that the results were consistent with the structural study for sintered samples at a temperature of 950 °C for 7 hours. It can be determined that the BSNT-BT ceramics have a perovskite structure which is like the main structure of ceramic type BNT. Dielectric properties and dielectric losses at room temperature showed that when increasing the amount of Sm2O3 in BSNT-BT ceramics the dielectric and low dielectric loss were consistent with reduced material resistance. Further the ferroelectric test found that BSNT-BT ceramics improved the ferroelectric properties when increasing the amount of Sm2O3 in the BSNT-BT ceramics.
การพัฒนาสื่อวีดิทัศน์ประกอบการสอนปฏิบัติวิชาแกะสลักผักผลไม้และงานใบตอง
The purpose of this study is to develop video media and find the effectiveness of practical fruits vegetable carving and banana leaf teaching to be efficient according to the criteria 80/80 and to study the students satisfaction towards video media of practical fruits vegetable carving and banana leaf teaching. The sample group used were 35 2nd-year undergraduate students Department of Home Economics Business Administration Faculty of Home Economics Technology from the Rajamangala University of Technology. Then divided into groups to estimate assessment form was used for media quality as well as student performance assessment form and also satisfaction assessment form was used data were analyzed using descriptive statistics and Inferential statistics. The results showed that video media of practical teaching fruits vegetable carving and banana leaf from 4 videos including 1. Vegetable carving 2. Fruits scooping and peeling 3. Petal folding from banana leaf and 4.Making ware from banana leaves. The overall media quality in terms of content is very good with an average score of 4.80 and a standards deviation of 0.18 The overall video quality is in very good condition an average score of 4.62 and a standards deviation of 0.42 which is effective 81.57/89.55 every performance exceeds the threshold which performs above the set regulative specified criteria of 80/80 the students satisfaction towards video media of practical teaching fruits vegetable carving and banana leaf overall all subjects were in the highest criteria with an average of 4.72 and standards deviation 0.48
การพัฒนาสื่อการสอนมัลติมีเดียการปักลายดอกไม้บนผลิตภัณฑ์เข็มกลัด ติดเสื้อสุภาพสตรีสำหรับนักเรียน วิทยาลัยสารพัดช่างนครหลวง
The purposes of this research were: 1) To find out effectiveness in multimedia-based teaching material of floral embroidery brooches and pinned in ladys clothes Nakornluang Polytechnic College 2) To evaluate its effectiveness of multimedia-based teaching material of floral embroidery brooches which were pinned in ladys clothes in Nakornluang Polytechnic College and 3) To investigate the students’ satisfaction on multimedia-based teaching of floral embroidery brooches pinned in ladys clothes Nakornluang Polytechnic College. The participants in this study were short-term students who enrolled in the second semester in the academic year of 2020. The participants included thirty-five students studied in Fabric Craft and three experts. The research instruments used in this study were the multimedia-based teaching material practice test the questionnaire measuring the effectiveness of multimedia-based teaching material and the satisfaction questionnaire. The results of the study can be summarized as follows: 1) The effectiveness of multimedia-based teaching material of floral embroidery brooches pinned in ladys clothes Nakornluang Polytechnic College was 80.17/ 87.31 which was higher than the specified criteria. 2) The experts’ attitudes towards the multimedia-based teaching material of floral embroidery brooches pinned in ladys clothes for students at Nakornluang Polytechnic College showed that this teaching material was suitable possible as well as useful at the highest level in all aspects. 3) The students also reported the highest level of satisfaction in all aspects on the multimedia-based teaching floral embroidery brooches pinned in ladys clothes Nakornluang Polytechnic College. To sum up this multimedia-based teaching material can be used to teach crafting fabrics for students studying short-term course in Nakornluang Polytechnic College.
การพัฒนาสื่อการเรียนการสอนวิชาประวัติศาสตร์ ชั้นประถมศึกษาปีที่ 4
The purposes of this research were to develop learning and teaching media on history primary 4 and study the satisfaction of the viewers who watched the media Development of media infographics in the form of fire parallax And can be used for the most benefit Population groups used in this project study are People who watch the media develop media infographics in the form of parallax on fire. Were selected by random selection of 30 people. The study found that the Development e-learning for history primary 4. The media satisfaction is at a high level.